Hex Head self drilling screws, for joining roofing sheets to light gauge steel without the need to pre-drill a hole. Specification • Diameter: 5.5mm • Length: 38mm • Pack Qty: 500 • Colour/Plating: Zinc • Max Drill Thickness: 3mm • Size (Imperial): 12 x 1 1/2 Features and Benefits • Hex Head with integral washer to increase clamping effectiveness • Coarse Thread • Classic Point for drilling into metals without the need for pre-drilling
